<template>
  <div class="grand-child">
    <h3>孙组件</h3>
    <h4>a：{{ a }}</h4>
    <h4>b：{{ b }}</h4>
    <h4>c：{{ c }}</h4>
    <h4>d：{{ d }}</h4>
    <h4>x：{{ x }}</h4>
    <h4>y：{{ y }}</h4>
    <button @click="updateA(6)">点我将爷爷那的a更新</button>
  </div>
</template>

<script setup lang="ts" name="GrandChild">
  defineProps(["a", "b", "c", "d", "x", "y", "updateA"]);
</script>

<style scoped>
  .grand-child {
    margin-top: 20px;
    background-color: orange;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px black;
  }
</style>
